Not exactly a N8n issue but a possible issue related to the all the nodes which scrape Google Search Results.
Google has removed the “100 results” option to get search results, therefore all the scraping services (and rank monitoring services too) are scrambling to adapt their services (and prices).
Check your workflows, because if you use this feature to monitor the SERP, it would need a reworking in order to paginate over several pages and turn it into a loop, instead of making a single http call.