# Common Problems

# General

# I'm using incompatible extension version.

Use of incomaptible version of Lagom WHMCS Client Theme and Lagom Extensions could cause various issues. That's why before performing upgrade or installation of Lagom Extensions, you need to chek if specific version is compatible with Lagom WHMCS Client Theme version which you currently use on your WHMCS server.

# What can I do?

If you're already installed incompatible Lagom Extension version, you have 2 options:

  1. Update Lagom WHMCS Theme product, to version which is compatible with currently isntalled Lagom Extension, by fallowing update documentation article.
  2. Update Lagom Extension, to version which is compatible with your Lagom WHMCS Client Theme: