The SharinPix package includes the Permission Set named SharinPix Image Sync for Community Users that provides proper access rights to the SharinPix Image object which is used by the SharinPix Image Sync feature.

Therefore, to enable Community users to perform Image Sync, the SharinPix Image Sync for Community Users should be assigned to them.

To give Community users access to SharinPix components, the SharinPix Lightning Components Permission Set should be assigned to them.

In some cases, Community users need access to SharinPix objects such as SharinPix Permission. In such situations, you should proceed as follows:

• Go to Setup and search for Sharing Settings.
• Once on the Sharing Settings page, click on the Edit button.
• Next search for the object you intend to give access to Community users. We will use the SharinPix Permission object for this demo.
• Under the Default External Access column for the SharinPix Permission object, change the value from Private to Public Read/Write.
• Click on Save when done.

In some cases where SharinPix components are added to Salesforce standard or custom objects, Community users cannot access the components and receive an 'Access Denied' error instead. 

This is most probably because the users do not have the required external Read/Write access to the object permitting them to use the SharinPix components. 

To provide the required external Read/Write access to the object, you should proceed as follows:

• Go to Setup and search for Sharing Settings.
• Once on the Sharing Settings page, click on the Edit button.
• Next search for the object you intend to give access to Community users.
• Under the Default External Access column for the SharinPix Permission object, change the value from Private to Public Read/Write. Note: You may also need to provide Public Read/Write access under the Default Internal Access column if that's not already the case to be able to proceed.
• Click on Save when done