UnexpectedValueException: The Response content must be a string or object implementing __toString(), "boolean" given

Getting error after installing dompdf

[2020-01-28 18:23:03] local.ERROR: UnexpectedValueException: The Response content must be a string or object implementing __toString(), "boolean" given. in D:\xampp\htdocs\myproject\vendor\symfony\http-foundation\Response.php:399

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