Making Trax Camping

I am getting a ton of registered users but Ultimate Member plug-in is broken and no one can comment and I cannot approve. I tried deactivating and upgrading. Here is my fatal error message:
Plugin could not be activated because it triggered a fatal error.

Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM in /home/content/44/4411844/html/wp-content/plugins/ultimate-member/includes/class-init.php on line 136

Version 2.0.16

I cannot activate or delete. HELP please! I am losing customers. Thank you!
DesertFoxCamping.com

My slider is working after disabling a plug-in for adding columns. ??

P.S. The slider seems to be working on my phone. The only problem with the slider is when using Chrome. Webcraftuk – is this also true for you?

Hello kind WP folks. I am having the same issue of the slider not working since updating the Themegrill Accelerate theme. The back and forth arrows do not work to manually advance the slider images either. The slider is working in Firefox (cookies perhaps?) but not in Chrome.Can I go back to an older version of Themegrill Accelerate? Here is my page: https://desertfoxcamping.com/. I appreciate your help.