Login page

I have two site running ELGG and they both have a very similar problem.  If I do not login into the sites everyday they do not open with the theme's I use.  One opens to a blank white page the other reverts back to the generic ELGG theme.  On both sites I can deactivate the theme plugin and then reactivate it and they both do fine.  The site with the blank white login page is using Liberation theme and  Release - 2.2.0, Version - 2015062900 of elgg.  Since I can not login on this site I go to my file manager and upload "disabled" in the mod directory.  I can then login using the generic elgg theme.  Does anyone have any suggestion?  I have had no complaints from my users so I do not know if they are having the same problems.  Thanks, Bob