The Authentication Failed the Authentication Is Stale Please Try Again
Blackboard supports 3rd-party tools through Building Block (B2) and Learning Tools Interoperability (LTI) integrations. These integrations allow single-sign on between 3rd-party content or services or improve instructor/student efficiency by streamlining usage or synchronizing grades. Most LTI tools work exactly equally expected and designed.
We are enlightened of five (5) types of errors with LTI tools:
| | Hallmark | Browser | Bare Screen | Student Preview | Expired API |
|---|---|---|---|---|---|
| What happens? | In a few cases, the LTI tools will generate an error when attempting to access: The authentication failed; the hallmark is stale. Please try again. | In some cases, yous need to enable a popular-up to allow the tool to open a new window. In other cases, a browser, such equally Safari, may take problem accessing the resource. Instead of launching the tool, the link volition redirect back to the content area where it is located. | Occasionally, attempts to access the LTI resource will produce a blank folio. This tends to happen if the LTI link has an apostrophe in the link proper noun. For case, if the LTI resource has a link called "Dr. One thousand'southward Connect Math Course" for McGraw-Hill Connect Math may produce this issue. | Instructors who enter Student Preview manner, and then open a page created with an LTI Integration volition non be able to exit Student Preview from the LTI tool. | In a rare situation, a vendor may need to refresh API ( application programme interface) to permit Blackboard to communicate with their systems via LTI. |
| What tool does it impact? | We've encountered this fault on occasion with VoiceThread and ALEKS. | Nosotros've encountered this error with VoiceThread and ALEKS. | We take non nevertheless encountered this consequence, but we are enlightened it may happen. | The Get out Student Preview box is moved behind the LTI page, and Student Preview mode is still active | We've encountered this error with eXplorance for SCEs. |
| Workaround | See Recommendation #1 beneath. | Come across Recommendations #two and #3 below. | Instructors should avoid using apostrophes in any LTI link name. | Select some other content area in your course and attempt to Exit Educatee Preview. | If you receive an fault message well-nigh an API error, please open an RT ticket. |
Annotation: Review the "performance equally designed" list of LTI tool behaviors.
Blackboard is enlightened of these issues and has identified a time to come fix, but not a specific timeline. Until such fourth dimension as we know the issue is resolved, nosotros recommend:
- Users should NOT click the launch button if presented. When the launch folio opens, Blackboard has started to cosign the user into the associated LTI application. Clicking the link will cause an authentication upshot and produce the "dried" error. Instead, please look and let Blackboard car-redirect to the resource. The link should work every bit expected.
- If you are using Safari, please switch to Chrome and follow the information in the first step.
- If Blackboard notwithstanding does non redirect to the LTI tool, delight make sure you allow Chrome to open pop-ups. Past default, pop-ups are blocked, just Blackboard needs to open windows.
- You may encounter a bulletin in the accost bar: Popular-upwards blocked
–
- Click the link for the pop-up window you'd similar to encounter.
- To e'er see pop-ups for the site, selectAlways allow popular-ups from [site]
Done.
- You should be able to click the launch button at this indicate, or shut the window and access the tool from the form.
- You may encounter a bulletin in the accost bar: Popular-upwards blocked
Performance every bit Designed: Not a Known Issue with LTI
- The LTI grade tool behavior was redefined by Blackboard (v3200.ten) to appear in an iframe lightbox if the link is non ready to open in a new window. The workaround is to set the LTI tool link to open up in a new window. If you do not want the link to open in a new window for aesthetic or functional reasons, please open up an RT ticket to schedule a consult with the Bb system admin.
- When the Student Preview tool is used, the box will appear above the LTI iframein which the LTI link is launched, which blocks the leave preview bulletin that allows the teacher to delete or retain the student preview data. The workaround is to click on the Home icon to view the course menu and access a different content area before exiting student preview mode.
Both of these tool behaviors are functioning as designed past Blackboard.
Related Article :Known Problems with Blackboard
Source: https://wiki.umbc.edu/display/faq/Cannot+access+LTI+tool+via+Blackboard
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