Continue Blacklisting Error

Hi, on a Desktop PC, most files are able to sync fine, but these ones are causing issues. The files just dont synchronize and they put these errors in the log: (I removed my domain and changed the names to protect the innocent)

Any Ideas?

12/1/2017 12:39:42 PM, Johnson/Bryoywn_Avbnvbn_Johnson_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “504 Gateway Timeout” to "MOVE https://sync.mydomain.com/remote.php/dav/uploads/admin/11736332/.file"
12/1/2017 12:39:42 PM, Johnson/Breyryrrwton_Kayryrla_Johnson_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “500 Internal Server Error” to “PUT https://sync.mydomain.com/remote.php/dav/uploads/admin/2942604254/00000002” (An exception occurred while executing ‘SELECT fileid FROM oc_filecache WHERE storage = ? AND path_hash = ?’ with params [2, “5ff895115fc457288f7418f9027b902e”]:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away)
12/1/2017 12:39:42 PM, Johnson/Branryrydon_vbnyrryna_Johnson_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “500 Internal Server Error” to “PUT https://sync.mydomain.com/remote.php/dav/files/admin/Johnson/Brryrandon_ryrana_ryryryson_export.3SZ” (An exception occurred while executing ‘UPDATE oc_file_locks SET lock = -1, ttl = ? WHERE key = ? AND lock = 1’ with params [1512104724, “files/14f0fa5f7ae7dd54d9f7b72eb3741791”]:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away)
12/1/2017 12:39:42 PM, Johnson/fhjghjghj_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “500 Internal Server Error” to “PUT https://sync.mydomain.com/remote.php/dav/files/admin/Johnson/ghjghjghgey_Johnson_export.3SZ” (An exception occurred while executing ‘UPDATE oc_file_locks SET lock = -1, ttl = ? WHERE key = ? AND lock = 1’ with params [1512104444, “files/9f7c1bf5846e258c52c1cc2cd845c1fb”]:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away)
12/1/2017 12:39:42 PM, Johnson/ghjhgjg/Johnson_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “500 Internal Server Error” to “PUT https://sync.mydomain.com/remote.php/dav/files/admin/Johnson/Bvbnvner_Jude_Johnson_export.3SZ” (An exception occurred while executing ‘UPDATE oc_file_locks SET lock = -1, ttl = ? WHERE key = ? AND lock = 1’ with params [1512104183, “files/563b4d59d397e019172275e90540a678”]:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away)
12/1/2017 12:39:42 PM, Johnson/Bvbnvbner_vbnvbn_Johnson_export.3SZ, D:\4Sync,Continue blacklisting: Server replied “500 Internal Server Error” to “PUT https://sync.mydomain.com/remote.php/dav/files/admin/Johnson/Bovbner_Avbnen_Johnson_export.3SZ” (An exception occurred while executing ‘UPDATE oc_file_locks SET lock = -1, ttl = ? WHERE key = ? AND lock = 1’ with params [1512153581, “files/4c9d3d4b08b640615e8e4d005560be3b”]:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away)
12/1/2017 12:37:38 PM, Johnson/Bvnvchi_Trisvbnvbna_Jvnbnson_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “504 Gateway Timeout” to "MOVE https://sync.mydomain.com/remote.php/dav/uploads/admin/3909152157/.file"
12/1/2017 12:37:38 PM, Johnson/Bennervbnbn_Johnson_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “500 Internal Server Error” to “PUT https://sync.mydomain.com/remote.php/dav/files/admin/Johnson/vbnbvn_Johnson_export.3SZ” (An exception occurred while executing ‘UPDATE oc_file_locks SET lock = -1, ttl = ? WHERE key = ? AND lock = 1’ with params [1512142689, “files/f91f6124b435e7267cc363a3e2e096d4”]:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away)
12/1/2017 12:37:38 PM, Johnson/vbnnnchvbnbvroun_vbnam_Johnson_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “504 Gateway Timeout” to "MOVE https://sync.mydomain.com/remote.php/dav/uploads/admin/2361239183/.file"
12/1/2017 12:37:38 PM, Johnson/vbnvbnvbn_Johnson_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “504 Gateway Timeout” to "MOVE https://sync.mydomain.com/remote.php/dav/uploads/admin/2438705017/.file"
12/1/2017 12:37:38 PM, Johnson/Avbnvbnvbn_Johnson_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “500 Internal Server Error” to “PUT https://sync.mydomain.com/remote.php/dav/files/admin/Johnson/vbnvbn_Johnson_export.3SZ” (An exception occurred while executing ‘UPDATE oc_file_locks SET lock = -1, ttl = ? WHERE key = ? AND lock = 1’ with params [1512123109, “files/ee08c3d82c837f8934bb5c5f844dc240”]:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away)
12/1/2017 12:37:38 PM, Johnson/vvbnvbnv_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “500 Internal Server Error” to “PUT https://sync.mydomain.com/remote.php/dav/files/admin/Johnson/vbnvbnvbnvb_export.3SZ” (An exception occurred while executing ‘UPDATE oc_file_locks SET lock = -1, ttl = ? WHERE key = ? AND lock = 1’ with params [1512079644, “files/fdb90eb70c47eb3d480e1cf38fe537d5”]:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away)
12/1/2017 12:37:38 PM, Johnson/vbnvbnvb_export.3SZ, D:\4Sync,The item is not synced because of previous errors: Server replied “500 Internal Server Error” to “PUT https://sync.mydomain.com/remote.php/dav/files/admin/Johnson/vbnvbnvbn.3SZ” (An exception occurred while executing ‘UPDATE oc_file_locks SET lock = -1, ttl = ? WHERE key = ? AND lock = 1’ with params [1512122726, “files/924a9b81f2ceb8531a0c9a2b9d91c545”]:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away)