error 500 BindingResolutionException

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Hi all,

This element generates a error 500 in my site
index.php/tools/required/reindex_pending_pages?ccm_token=1503391368:c2848bf1430a658fdbc37b424951fe7f


In the Inspector of Browser you can see that is about jquery:
jquery.js:5 GET https://xxxxxxxxxx/index.php/tools/required/reindex_pending_pages?ccm_token=1503391368:c2848bf1430a658fdbc37b424951fe7f 500 (Internal Server Error)
send @ jquery.js:5
ajax @ jquery.js:5
m.(anonymous function) @ jquery.js:5
ccm_doPageReindexing @ app.js:4
(anonymous) @ (index):2601
j @ jquery.js:2
fireWith @ jquery.js:2
ready @ jquery.js:2
J @ jquery.js:2


And this is the error info when you try to access there:
Illuminate \ Contracts \ Container \ BindingResolutionException
Target [Concrete\Core\Search\Index\IndexManagerInterface] is not instantiable while building [Concrete\Core\Foundation\Runtime\Run\DefaultRunner]

25 Illuminate\Contracts\Container\BindingResolutionException 
…/­vendor/­illuminate/­container/­Container.php748


How could I know that block or code it's generating the error?
Thank you in advance