I am seeing this issue on my WooCommerce status page in regards to my store’s Catch Theme:
catch-store/product-searchform.php version – is out of date. The core version is 3.3.
I contacted WooCommerce support, and they have advised contacting the theme author to issue an update. I have been having another error which may be the result of the out-of-date theme version. I have been attempting to disable tax calculations in WooCommerce, but the setting reverts to being enabled, and WooCommerce support thought it may have something to do with the outdated theme version.