Error with MW 1.44: Class "Html" not found

[samwilson]

When running QRLite on MediaWiki 1.44, the following error results:

Class "Html" not found

Backtrace:

from extensions/QRLite/src/QRLiteFunctions.php(79)
#0 extensions/QRLite/src/QRLiteHooks.php(48): MediaWiki\Extension\QRLite\QRLiteFunctions::generateQRCode()
#1 includes/parser/Parser.php(3492): MediaWiki\Extension\QRLite\QRLiteHooks->qrliteFunctionHook()
#2 includes/parser/Parser.php(3147): MediaWiki\Parser\Parser->callParserFunction()
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