TYPO3 v13 introduced a data object TYPO3\CMS\Core\LinkHandling\TypolinkParameter similar to Fluid Component's Typolink object. To preserve compatibility with older version and to allow string input, I'd suggest to add another converter implementation to convert the TYPO3 object to Fluid Component's implementation. Currently, if the new object is passed to a component that annotates the Typolink type, an exception is thrown.

Core class: https://github.com/TYPO3/typo3/blob/main/typo3/sysext/core/Classes/LinkHandling/TypolinkParameter.php

Necessary changes:

• add new converter interface
• add it to list in ComponentArgumentConverter.php
• implement new interface in Typolink class