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I have tried these in your website:
1) Deactivate all other plugins(Except Toolset + Woocommerce + AMP plugin), rename the /wp-content/mu-plugins/ to /wp-content/mu-plugins-bak/
2) Switch to parent Astra theme
3) Since you are using old version of AMP plugin, so I have tried to install the latest version of AMP plugin in your website, but get below error message: Installation failed: Could not copy file. accelerated-mobile-pages/accelerated-moblie-pages.php
See my screenshot amp.JPG