Look at the actual fault.
The page address, error message and steps that reproduce the problem are more useful than guessing which plugin is responsible. We check the relevant parts of the setup before deciding what to change.
Check the current versions and licences.
Themes, plugins, WordPress and hosting can all affect the job. I check what is installed, which updates are available to you and whether the licences needed for the work are current. Paid renewals are discussed separately.
Agree a safe place to make changes.
We establish the available backup and test options before an intrusive repair. If a staging copy, a separate test version of the site, is needed, its setup and handling of private data form part of the agreed work. Access stays limited to what the job needs.
Check the result and hand it back.
The quote names the pages or functions to test, and what follow-up is included. I explain the change and any outstanding work so you know what was fixed and what still needs attention.