diff --git a/package-lock.json b/package-lock.json
index 5ead6dd..87c06d1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "solid-logic",
-  "version": "4.0.3",
+  "version": "4.0.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "solid-logic",
-      "version": "4.0.3",
+      "version": "4.0.4",
       "license": "MIT",
       "dependencies": {
         "@inrupt/solid-client-authn-browser": "^3.1.0",
diff --git a/package.json b/package.json
index cca7391..4b73f4e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "solid-logic",
-  "version": "4.0.3",
+  "version": "4.0.4",
   "description": "Core business logic of SolidOS",
   "type": "module",
   "main": "dist/solid-logic.js",
diff --git a/src/typeIndex/typeIndexLogic.ts b/src/typeIndex/typeIndexLogic.ts
index 0871438..9505f65 100644
--- a/src/typeIndex/typeIndexLogic.ts
+++ b/src/typeIndex/typeIndexLogic.ts
@@ -7,6 +7,10 @@ import { newThing } from '../util/utils'
 export function createTypeIndexLogic(store, authn, profileLogic, utilityLogic): TypeIndexLogic {
     const ns = namespace
 
+    function isAbsoluteHttpUri(uri: string | null | undefined): boolean {
+        return !!uri && (uri.startsWith('https://') || uri.startsWith('http://'))
+    }
+
     function getRegistrations(instance, theClass) {
         return store
             .each(undefined, ns.solid('instance'), instance)
@@ -82,7 +86,7 @@ export function createTypeIndexLogic(store, authn, profileLogic, utilityLogic):
         return scopes
     }
 
-    async function loadCommunityTypeIndexes(user: NamedNode): Promise<TypeIndexScope[][]> {
+    async function loadCommunityTypeIndexes(user: NamedNode): Promise<TypeIndexScope[]> {
         let preferencesFile
         try {
             preferencesFile = await profileLogic.silencedLoadPreferences(user)
@@ -96,7 +100,15 @@ export function createTypeIndexLogic(store, authn, profileLogic, utilityLogic):
             )
             let result = []
             for (const org of communities) {
-                result = result.concat(await loadTypeIndexesFor(org as NamedNode) as any)
+                if (org.termType !== 'NamedNode' || !isAbsoluteHttpUri((org as NamedNode).uri)) {
+                    debug.warn(`Skipping malformed community node for ${user}: ${org}`)
+                    continue
+                }
+                try {
+                    result = result.concat(await loadTypeIndexesFor(org as NamedNode) as any)
+                } catch (err) {
+                    debug.warn(`Skipping community type indexes for ${(org as NamedNode).uri}: ${err}`)
+                }
             }
             return result
         }
@@ -104,7 +116,7 @@ export function createTypeIndexLogic(store, authn, profileLogic, utilityLogic):
     }
 
     async function loadAllTypeIndexes(user: NamedNode) {
-        return (await loadTypeIndexesFor(user)).concat((await loadCommunityTypeIndexes(user)).flat())
+        return (await loadTypeIndexesFor(user)).concat(await loadCommunityTypeIndexes(user))
     }
 
     async function getScopedAppInstances(klass: NamedNode, user: NamedNode): Promise<ScopedApp[]> {
@@ -130,10 +142,10 @@ export function createTypeIndexLogic(store, authn, profileLogic, utilityLogic):
     function docDirUri(node: NamedNode): string | null {
         const doc = node.doc()
         const dir = doc.dir()
-        if (dir?.uri) return dir.uri
+        if (dir?.uri && isAbsoluteHttpUri(dir.uri)) return dir.uri
         const docUri = doc.uri
-        if (!docUri) {
-            debug.log(`docDirUri: missing doc uri for ${node?.uri}`)
+        if (!docUri || !isAbsoluteHttpUri(docUri)) {
+            debug.log(`docDirUri: missing or non-http(s) doc uri for ${node?.uri}`)
             return null
         }
         const withoutFragment = docUri.split('#')[0]
diff --git a/src/types.ts b/src/types.ts
index 0d145cd..62a6585 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -96,7 +96,7 @@ export interface InboxLogic {
 export interface TypeIndexLogic {
     getRegistrations: (instance, theClass) => Node[],
     loadTypeIndexesFor: (user: NamedNode) => Promise<Array<TypeIndexScope>>,
-    loadCommunityTypeIndexes: (user: NamedNode) => Promise<TypeIndexScope[][]>,
+    loadCommunityTypeIndexes: (user: NamedNode) => Promise<Array<TypeIndexScope>>,
     loadAllTypeIndexes: (user: NamedNode) => Promise<Array<TypeIndexScope>>,
     getScopedAppInstances: (klass: NamedNode, user: NamedNode) => Promise<ScopedApp[]>,
     getAppInstances: (klass: NamedNode) => Promise<NamedNode[]>,
diff --git a/test/typeIndexLogic.test.ts b/test/typeIndexLogic.test.ts
index 18f4338..529deb2 100644
--- a/test/typeIndexLogic.test.ts
+++ b/test/typeIndexLogic.test.ts
@@ -170,6 +170,27 @@ describe('TypeIndex logic NEW', () => {
         const result = await typeIndexLogic.loadCommunityTypeIndexes(alice)
         expect(result).toEqual(ClubScopes)
         })
+        it('skips malformed non-NamedNode community entries', async () => {
+        web[AlicePreferencesFile.uri] = `
+            ${alice} solid:privateTypeIndex ${AlicePrivateTypeIndex};
+            solid:community ${club};
+            solid:community "not-a-webid" .
+        `
+
+        const result = await typeIndexLogic.loadCommunityTypeIndexes(alice)
+        expect(result).toEqual(ClubScopes)
+        })
+        it('continues when one community fails to load', async () => {
+        const brokenCommunity = sym('https://broken.example.com/profile/card.ttl#it')
+        web[AlicePreferencesFile.uri] = `
+            ${alice} solid:privateTypeIndex ${AlicePrivateTypeIndex};
+            solid:community ${brokenCommunity};
+            solid:community ${club} .
+        `
+
+        const result = await typeIndexLogic.loadCommunityTypeIndexes(alice)
+        expect(result).toEqual(ClubScopes)
+        })
     })
 
     const AliceAndClubScopes =  [{'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/publicStuff/actionItems.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/profile/card.ttl#me'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/profile/public-type-index.ttl'}, 'label': 'public'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}, {'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/project4/issues.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/profile/card.ttl#me'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/profile/public-type-index.ttl'}, 'label': 'public'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}, {'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/privateStuff/ToDo.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/profile/card.ttl#me'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/settings/private-type-index.ttl'}, 'label': 'private'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}, {'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/privateStuff/Goals.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/profile/card.ttl#me'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/settings/private-type-index.ttl'}, 'label': 'private'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}, {'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/privateStuff/workingOn.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/profile/card.ttl#me'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://alice.example.com/settings/private-type-index.ttl'}, 'label': 'private'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}, {'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/publicStuff/actionItems.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/profile/card.ttl#it'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/profile/public-type-index.ttl'}, 'label': 'public'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}, {'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/project4/clubIssues.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/profile/card.ttl#it'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/profile/public-type-index.ttl'}, 'label': 'public'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}, {'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/privateStuff/ToDo.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/profile/card.ttl#it'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/settings/private-type-index.ttl'}, 'label': 'private'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}, {'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/privateStuff/Goals.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/profile/card.ttl#it'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/settings/private-type-index.ttl'}, 'label': 'private'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}, {'instance': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/privateStuff/tasks.ttl#this'}, 'scope': {'agent': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/profile/card.ttl#it'}, 'index': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'https://club.example.com/settings/private-type-index.ttl'}, 'label': 'private'}, 'type': {'classOrder': 5, 'termType': 'NamedNode', 'value': 'http://www.w3.org/2005/01/wf/flow#Tracker'}}]