Rebuild backend and clear cache returns Error 500

[greenstones]

I've moved our espo install to a new server using rsync. The file permissions / owners are identical to the old server. Everything works except for when I try to "rebuild backend and clear cache".

[2017-03-22 10:39:58] Espo.ERROR: Fault to rebuild database schema. Details: Unknown database type enum requested, Espo\Core\Utils\Database\DBAL\Platforms\MySqlPlatf orm may not support it.

[2017-03-22 10:39:58] Espo.ERROR: API [POST]:/Admin/rebuild, Params:Array ( ) , InputData: - Error while rebuilding database. See log file for details.

Any suggestions?

[tanya]

hello

https://github.com/espocrm/espocrm/issues/217

write also server/php/mysql/espocrm versions

[greenstones]

hello

https://github.com/espocrm/espocrm/issues/217

write also server/php/mysql/espocrm versions

Centos 7 / php 7.1 / MySQL 5.5.52 / espocrm 4.5.0

I've not made any changes to entities etc.