I found it on the link to which chickenslegs pointed me. On my Samsung phone, it was Settings >Connections >More connection settings >VPN, where "Always-on VPN" is now disabled.
What really solved the problem in the end was saving the link to that dictionary web page in Opera and I am now using this. With the link from the Chrome browser, I was asked to choose between disabling the ad blocker (of which I had no knowledge and did not know where to look for it) and paying for a subscription. With he link from Opera, I now got the option of clicking on "Continue with ads" and "Subscibe". I selected "Continue with ads" and on subsequent page loads I no longer have to make this selection but am brought directly to the page. Opera probably has set a cookie for this.