su; # become root

yum install kernel-devel # get kernel source

# kernel sources will be copied to

/usr/src/kernels/3.10.0-514.16.1.el7.x86_64/

# there is a broken softlink in

# /usr/src/kernels/3.10.0-514.el7.x86_64

# ->

# /usr/src/kernels/3.10.0-514.16.1.el7.x86_64/

# which you will have to fix like this

unlink /lib/modules/3.10.0-514.el7.x86_64/build; # remove old link

ln -sv /usr/src/kernels/3.10.0-514.16.1.el7.x86_64/ /lib/modules/3.10.0-514.el7.x86_64/build; # create new link to correct path

rerun the setup of acronis now it should work

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