Error message

• Warning: Attempt to assign property 'expire' of non-object in MemCacheDrupal->valid() (line 127 of /home/gacsachonline/gacsach.online/sites/all/modules/memcache/memcache.inc).
• Warning: Attempt to assign property 'created' of non-object in MemCacheDrupal->valid() (line 130 of /home/gacsachonline/gacsach.online/sites/all/modules/memcache/memcache.inc).