lessphp fatal error: load error: failed to find error after migrating wordpress website to new server
I just had that same error. I got rid of it by deleting the .cache files in the folders of the named files in the error message.
Delete/wp-content/themes/theme44107/bootstrap/less/bootstrap.less.cache/wp-content/themes/theme44107/style.less.cache
After that the error message went away and the site worked.
we used https://interconnectit.com/products/search-and-replace-for-wordpress-databases/ to find and replace incorrect database path links. they needed to be updated from /hermes/bosnaweb18a/b2978/ipw.m3federalcom/ to our current linux servers file paths. we then updated the permalinks in wp-admin. we also deleted the .cache files under wp-content to remove stored site caching. after all that, site started functioning properly.