phpBB • Free and Open Source Forum Software

To receive extension support please visit our Extensions Database and post in the specific extension's designated support area. The link to the support area for each released extension is also available in the first post of each released extension listed in the [3.2.x] Extension Database Releases fo...

Writing to the cache directory is not a security issue, and as such I have removed that from your topic title.
In all cases phpBB has a requirement that it has a directory that is writeable, and if you don't have that ability you won't be able to use phpBB.

To receive extension support please visit our Extensions Database and post in the specific extension's designated support area. The link to the support area for each released extension is also available in the first post of each released extension listed in the [3.2.x] Extension Database Releases fo...

To receive extension support please visit our Extensions Database and post in the specific extension's designated support area. The link to the support area for each released extension is also available in the first post of each released extension listed in the [3.2.x] Extension Database Releases fo...

No, the cause is not specificly the proxy manager, but a new feature in Composer, and when there are multiple vendor folders (What happens if there are extensions with a vendor + phpBB itself), the extensions class map overrides phpBB's. This is a new feature in composer 2; https://getcomposer.org/d...

The only solution is not placing them online.