I ran into this problem since IDEA 13.0.1 , now, since 13.1.4 , I am finding it difficult to 13.1.4 , I have found something that works for me.
Note: I am using linux and svn 1.7 .
a. I am adding some parameters to the JVM for IDEA, these parameters can be added to the file:
${IDEA_INSTALL_DIR}/bin/idea64.vmoptions
(in my case, I have 64 bits of linux, for 32 bits - idea.vmoptions in one place)
I will add the following JVM parameter to the end of the file:
-Dsvnkit.http.methods=Basic,Digest,NTLM
ref: source link
Q. My default linux svn version is 1.8, I think the ~ / .subversion / * files can have 1.8 specific formats (I will find the answer later :)), and suppose I used a different path for svn 1.7 auth and conf files, in my case ~/.subversion1.7/ .
C. In IntelliJ, I go to subversion settings (Settings-> Version Control-> Subversion) and configure my settings as the following image:

Right there, I used the new path for auth files and the path to svn 1.7.
D. After all this, I click the " Clear Caching " button.
E. Restart IntelliJ and everything works fine, as before, in older versions.
.-
I tried each step alone, but did not work, until I put everything together, I got the results of success.
I hope this can help someone else because it is a bug / problem with IDEA 13. * and SVN.
Sincerely. iVieL.