语法：But the willingness to cooperate with each other at least

语法：But the willingness to cooperate with each other at least will put them on the right track
to finding solutions .这句话有错误吗?为何不是 track to find solutions

没有错误.
put them on the right track to finding solutions 中的 to 是介词,后接名词性的词或词组.
to finding solutions 是介词短语作后置定语修饰 the right track.
再问： 为何不是 TO DO 呢？
再答： 因为 a track to 后面要接一个表示目的地或某一地方的名词性的词。to do 是动词的不定式，不能用来做后置定语修饰 track。