I am running InvoicePlane 1.5.4 on PHP 7.1. When trying to generate a report for the last quarter I receive the following error.
/reports/sales_by_year
A PHP Error was encountered
Severity: Notice
Message: A non well formed numeric value encountered
Filename: src/Tag.php
Line Number: 2723
Generating a Report by customer “/reports/sales_by_client” does work as it should.