Found the following HTML validation problems:
GoF.html:19:1 (GoF.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit"
gofACoD.html:19:1 (gofACoD.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Adjusted Coefficient of Determination (Adjusted R-Squared)"
gofAIC.html:19:1 (gofAIC.Rd:5): Warning: <h2> attribute "criterion'" lacks value
gofAIC.html:19:1 (gofAIC.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Akaike"
gofAIC.html:19:1 (gofAIC.Rd:5): Warning: <h2> proprietary attribute "s"
gofAIC.html:19:1 (gofAIC.Rd:5): Warning: <h2> proprietary attribute "information"
gofARSq.html:19:1 (gofARSq.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Adjusted R-Squared"
gofCAIC.html:19:1 (gofCAIC.Rd:5): Warning: <h2> attribute "criterion'" lacks value
gofCAIC.html:19:1 (gofCAIC.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Corrected Akaike"
gofCAIC.html:19:1 (gofCAIC.Rd:5): Warning: <h2> proprietary attribute "s"
gofCAIC.html:19:1 (gofCAIC.Rd:5): Warning: <h2> proprietary attribute "information"
gofCV.html:19:1 (gofCV.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit - Coefficient of Variation"
gofCoD.html:19:1 (gofCoD.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Coefficient of Determination (R-Squared)"
gofMAD.html:19:1 (gofMAD.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Mean Absolute Deviation"
gofMAPE.html:19:1 (gofMAPE.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit - Mean Absolute Percentage Error"
gofME.html:19:1 (gofME.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Mean Error"
gofMRAE.html:19:1 (gofMRAE.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Mean Relative Approximation Error"
gofPC.html:19:1 (gofPC.Rd:5): Warning: <h2> attribute "coefficients'" lacks value
gofPC.html:19:1 (gofPC.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit - Pearson"
gofPC.html:19:1 (gofPC.Rd:5): Warning: <h2> proprietary attribute "s"
gofPC.html:19:1 (gofPC.Rd:5): Warning: <h2> proprietary attribute "correlation"
gofPI.html:19:1 (gofPI.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Performance Index"
gofRAE.html:19:1 (gofRAE.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : Global Relative Approximation Error"
gofRMSE.html:19:1 (gofRMSE.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit - Root Mean Square Error"
gofRRMSE.html:19:1 (gofRRMSE.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of fit - Relative Root Mean Square Error"
gofRSq.html:19:1 (gofRSq.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit : R-Squared"
gofSDR.html:19:1 (gofSDR.Rd:5): Warning: <h2> attribute "id" has invalid value "Goodness of Fit - Standard Deviation Ratio"