Hi,
Please complete the following in order to detect the problem and find its solution:
1) Try activating a standard WP theme for a while (2014, 2015) and check if the problem remains.
2) Try deactivating all of your plugins except Google Short Link and also check if the problem is still present. If it is not, please activate the plugins one-by-one, meanwhile checking, after which plugin activation the problem appears again.
3) Provide your System status as well. Follow the next instruction – https://docs.google.com/document/d/1Wi2X8RdRGXk9kMszQy1xItJrpN0ncXgioH935MaBKtc/edit
4) Let us know about the results.
Sincerely,
BestWebSoft Support Team