Files are encrypted: HBEGIN:oc_encryption_module:OC_DEFAULT_MODULE:cipher:AES-256-CTR:signed:true:HEND

Nextcloud version 14.0.4 :
Nextcloud hosted on one.com :
PHP version 7.1

After updating nextcloud to version 14.0.4 all my files are encrypted, when i open text files etc all i see is: HBEGIN:oc_encryption_module:OC_DEFAULT_MODULE:cipher:AES-256-CTR:signed:true:HEND

Are there a way to decrypt my files again?