string(45) "Call to undefined method Cache::SaveChanges()"

Call to undefined method Cache::SaveChanges()
/var/www/html/cms4_dev/libs/cms/index.php(1225) : eval()'d code (line 3)

TRACE:

Cms->RenderBlock [line 1235]
Cms->ExecuteBlock [line 1574]
Cms->ExecuteBlockByCode [line 1508]

SIDE: DEV
AREA:  (5)
APP: wam (23)
PHP [block > #tailcode]
BLOCK [#tailcode]
OPERATION: [#tailcode]
DETAIL: [RenderBlock:PHP]
MEMORY LIMIT: 800 MB