For Google Chrome: verify Group Policies
Under Native Messaging, a policy might block all native messaging hosts :
(NativeMessagingBlacklist = *)
If this is the case for your organization, you should explicitly excempt bisc from the block list : NativeMessagingWhitelist = bisc https://admx.help/?Category=Chrome&Policy=Google.Policies.Chrome::NativeMessagingWhitelist
For Microsoft Edge: verify Group Policies
Under Native Messaging, a policy might block all native messaging hosts :
(NativeMessagingBlocklist = *)
If this is the case for your organization, you should explicitly excempt bisc from the block list : NativeMessagingAllowlist = bisc https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-policies#nativemessagingallowlist
For Firefox: Check if you use the NoScript add-on.
From the Menu, select Add-ons then Extensions.
Next to NoScript, click Options.
Add these websites to the list of trusted websites: https://webbanking.ibs6.isabel.be, https://www.isabel.eu and https://www.isabel.be
Your browser does not receive an answer from the Isabel Security Components