Parse Error in sibebar.php

I keep getting the following error at the bottom of my page, but only in the archive and search page.

Parse error: parse error, unexpected $ in /home/content/J/o/r/Jordanstyl/html/OnlyOneMike/blog/wp-content/themes/problogger-clean/sidebarpage.php on line 56

I’ve deleted both pages and started from scratch but the errors seem to return.

Here is a link to the archive page:
https://www.onlyonemike.com/blog/archive/

I’m very new at this, any help would be appreciated.

Thanks,
Mike