Correction of errors in the CRM/ERP system for housing and communal services and its constant support. Yii2 framework

Good afternoon dear applicants. We have a CRM/ERP system for companies in the housing and utilities sector. Yii2 framework. We stopped its development but it is still used by clients and we need a programmer who will fix periodic bugs and will maintain its performance. At the moment, one of the modules has stopped working, you need to fix it. Perhaps in the future we will agree on its further development.