Warning: Illegal offset type

Dear Sir/madam,

My name is Kiril and the reason that I am contacting you is regarding my recent download of your wordpress plugin – User Language Switch. It seems to be working fine, however I got an error at the top of my header saying – “Warning: Illegal offset type in isset or empty in /home/content/p3pnexwpnas14_data02/32/3034332/html/wp-content/plugins/user-language-switch/user-language-switch.php on line 1171”. What I am trying to create is a multi-lingual site on one domain. I figured I would have to create a clone page of every of my information in a different language in order for this thing to work. However, I keep getting that error and have no clue how to fix it.
I am currently building my site using Beaver Page builder.After installing the plugin, I figured that the only way to make it duo-lingual is to make a duplicate page of every page and translate it into the desired language.However that error keeps on blocking me from accessing further and crashes my website
I would be more than glad to hear any suggestions that you might have or if I have to clarify things further

Thanks in advance!

Sincerely,

Kiril

https://wordpress.org/plugins/user-language-switch/