DP 10.91 Linux mmd service down

Hi fellows i have a 2 months older Cell Manager Linux  (OL 7.9) with DP 10.91. 

Suddenly backups failed and when checked services all up except mmd

I review old posts where stated to delete mmd.ctx file but this file doesnt exist what other things may i check to solve that.

I opened a case but noone from support responds.

Best Regards