fatal error

My website https://travelcollecting.com crashed because of a fatal error in Rankmath. I entered WordPress in Recovery Mode and deactivated Rankmath. When I tried to reactivate it, I get message:

Warning: include(/home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/vendor/autoload.php): failed to open stream: No such file or directory in /home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/rank-math.php on line 258

Warning: include(): Failed opening ‘/home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/vendor/autoload.php’ for inclusion (include_path=’.:/usr/share/pear’) in /home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/rank-math.php on line 258

Fatal error: Uncaught Error: Class ‘RankMath\Installer’ not found in /home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/rank-math.php:272 Stack trace: #0 /home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/rank-math.php(185): RankMath->instantiate() #1 /home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/rank-math.php(164): RankMath->setup() #2 /home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/rank-math.php(550): RankMath::get() #3 /home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/rank-math.php(554): rank_math() #4 /home/sites/6b/7/7a9274466d/public_html/wp-admin/includes/plugin.php(2286): include_once(‘/home/sites/6b/…’) #5 /home/sites/6b/7/7a9274466d/public_html/wp-admin/plugins.php(191): plugin_sandbox_scrape(‘seo-by-rank-mat…’) #6 {main} thrown in /home/sites/6b/7/7a9274466d/public_html/wp-content/plugins/seo-by-rank-math/rank-math.php on line 272